Baffle or arch for locomotive fire-boxes.



W. L. HITCHCOCK.

BAFFLE 0R ARCH FOR LOCOMOTIVE HRE BOXES.

APPLICATION FILED AUG. 12. I915.

WI NESS'ES WILLIAM L.

HITCHCOCK, OF PORTSMOUTH.

OHIO.

RAFFLE 0R ARCH FOR LOCOMOTIVE FIRE-BOXES.

Specification of Letters Patent.

Application filed August 12. 1915.

To all I /mm, it Hill/ on ern.

lie it known th-it I, 11.1mm! li. lll'l('!lrornfa citizen of the United States, and a resident of loitsnioutlndn the county oi Scioto and State of Ohio. have invented certain new and useful Improvements n Battles or Arches for Locomotive Fire- Boxes: and I do hereby declare the follow ing to be a full, clear. and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

31y invention relates to an improvement in battles or arches for locon'iotive lire boxes, the object being to provide a refractory arch which can be readily and quicklv installed in a fire box; which when installed will be locked against accidental displacement of any of its parts. and which is constructed to deflect the products of combustion against the arch tubes and thoroughly and rapidly mix such products before they pass to the top of the arch.

With these objects in view my invention consists in the details of construction as will be more fully described and pointed out in the claims.

In the accompanying drawings, Figure l is a view in plan showing the bailie or arch supported on the arch tubes; Fig. 2 is it end view of the same; Fig. 3 is a view in see tion on the line A.A of Fig. 1; Fig. l is a perspective view of one of the intermediate bricks; Figs. 5 and 6 are views in section of same; Fig. 7 is a view in perspective of one of the side or end bricks and Figs. 8 and J are views in section of the latter.

In the present instance I have shown four arch tubes 1. communicating at their ends with the boiler, and arranged in two pairs, one pair being at each side of. the longitudinal center'of the fire box. the space between the inner tubes of the two pairs being greater than the space between the tubes of each pair, and also greater than the space between the outer tubes of each pair and the side sheets 2. This arrangemei'it of tubes is however not essential.

The arch rests upon the arch tubes. and is composed of a central longitudinal row of bricks 3. of the same dimensions, two in termediate rows 4 of the same dimensions and two outer rows 5, all of them being of such size as to be conveniently handled and missed th rough the fuel door of the fire box.

The bricks of the central and intermediate Patented Oct. 24, 191.6. Serial No. 45.210.

rows 3 and l are alike, except that the bricks of the center row may be longer than those oi the intermediate rows. and each is provided on its lower fare with a plurality of ribs 6 forming a series of grooves or channels which extend lengthwise the bricks and transverse of the lire box, and operate to retard and thoroughly colllmlngle the prod acts of combustion in their passage under the arrh. and also to direct tln' said burning and highly heated products transversely and into direct cfinturt with the arch tubes 1 and assist in heating the same. The opposite ends of earh ot' the bricks t and i. are beveled upwardly and inwardly. and each is provided at each end with a mortise 7 pref erably rounded as shown: at one side edge with a tenon 8 also preferably rounded. and at its opposite side with a mortise it shaped to receive the rounded tenou h on the next adjacent brick in its row. The mortises T and it. and tenon H of each brick are in the same horizontal plane so as to render them interchangiml'ile. and the ribs (3 on the underside of the central and intern'iediate rows of bricks ul'tfQclJt away at their extreme ends as at 10. to form curved seats which rest on the arch tubes 1 as clearly shown in l ig. 2. the seats being of less depth than the ribs so as to leave passage ways between said ribs over the arch tubes 1.

The bricks- 5 of the two outer rows also have ribs 6 \ghi'ch aline with the ribs on the bricks 3 and "l in the assembled arch, and these ribs are continued up at the outer ends of the bricks as at 1.1, and are slightly inclined, so that when the outer bricks are as seinbled in their inclined positions as shown in Fig. the? ribs 11 will be approxinmtely parallel wth the side sheets 2, and form side channels through which the products of combustion may pass upwardly to the space iirtlie fire box above the arch. The inner ends of the ribs 6 of these bricks 5, are cut a way to form recessed seats for the ad jacent arch tubes, and their inner ends are each provided with a rounded rib 8 which engages and rests within the mortiscs 7 in the outer ends of the bricks 4 of the intermediate rows. thus locking the outer rows of bricks to the intermediate rows and preventing them from having any tendency to ride up on their supporting arch tubes.

he bricks of each row 3. 4 and 5. are locked together by mortise 9 and tenon t" joint, but each of these rows is not connected with others, so that there is but little chance for the bricks of one row becoming fused to those of the adjacent row, while those of each row are purposely connected so as to cause them to fuse, and become united. \Vith an arch thus constructed defective or broken bricks will be. retained in place, and may be readily broken apart to remove them when necessary to do so for the purpose of making repairs.

The ribs 11 at the ends of the bricks of the side rows may be readily and quickly trimmed or chipped oti' 'n order to properly seat the brick 5 on the to es 1, and give them the proper inclinatioiuwith relation to the side sheets and with each other, so that when assembled, the tenon 8 of one will enter the mortise 9 of the next adjacent brick in the same row.

The ribs on the underside of the bricks extend. throughout the length of the latter, so that the gases and products of cmnbus tion in their passage under the arch will be retarded in their movements, and thoroughly conn'ningled before passing into the space above the archQ-and some will be delien-ted laterally against and over the tubes and assist in heating the hitter.

By providing the intermediate brick with a mortise 7 at each end the bricks of the two rows will be interchangeable and engage the end tenons 8" of the bricks of the side rows.

Having fully described my invention what I claim as new and desire to secure by l ietters-Patent, is

1. An arch brick for locomotive fire boxes ha ving a plurality of ribs on its lower face 2. The combination of a group of arch vibes, and an arch supported on said tubes, the said arch composed of a series of rows of bricks extending lengthwise the tire box, the bricks of each row ha ring a mortise and tenon connection, and the bricks ol the adjacent rows having alinin depending ribs on their lower faces, the said ribs being cut away to form recessed scab; to engage the arch tubes. the said seats bein of less depth than the ribs so as to leave 1 wage ways for the products of combustion over the tubes.

3. The combination of a group of arch tube: and an arch supported on said tubes, the bricks of the two outer rows of the arch each having a pllnfalit vof ribs on its lower face and outer end and the ii'u'ermediatc bricks having ribs on their lower faces only. the ribs on the lower faces of the outer and intermediate rows being cut away to form curved seats to engage the arch tubes, the said seats being of less depth than the ribs so as to leave passage ways for the products of comlmstion over the tubes.

-'l ;\n arch brick for in oinotive lire boxes having a plurality of 1s on its underside which ribs are continues up one end of the brick forming a plurality of gas deflecting channels under the entire brick and up one end of the latter.

The com ination of furnace walls and a series of tubes arranged therein, of bricks supported by said tubes and constituting the body portion of the baflie or arch, side rows of bricks supported by the outermost tubes, said side rows of bricks leaning against the walls of the furnace, all of said bricks having recesses or grooves designed to register with each other and forming continuous spaces around each of the tubes.

in testimony whereof I have signed this specification in the presence of two-subscribing witnesses.

WILLIAM L. HITCHCOUK.

\Vitnesses \Vumun b. .Hamnxron, W. B. Hrrcncock. 

